若两个数的积为负数,则这两个数( )
A.和一定为负数
B.差一定为负数
C.一定互为相反数
D.商一定为负数
若两个数的积为负数,则这两数异号且均不为0,
因此商一定为负数.
故选D.
Although her disease her eyesight and forced her to leave the dance floor, she refuses to fall into self-pity.
A.has affected
B.affected
C.affects
D.had affected
如果x1,x2,x3三个数的算术平均值为5,则x1+2,x2-3,x3+6与8的算术平均值为()。
A.A
B.B
C.C
D.D
E.E